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Troubleshooting; Table 14 Troubleshooting Guide - Liebert InteleCool 2 User Manual

Outdoor wall-mount air conditioner,1.5 - 5 tons, 50 & 60 hz
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8.0
T
ROUBLESHOOTING
Table 14
Troubleshooting guide
Problem
Unit will not start
No cooling
Unit cycles on
high pressure switch
Heat does not operate
Probable Cause
No power to unit
Check voltage to input circuit breaker.
Control voltage circuit
Locate short and reset breaker.
breaker open
Shut off by external
Check operation of thermostat.
thermostat or stat is
defective
Low refrigerant
Check with gauges.
charge
Compressor contactor
Check voltage at contactor. If not present refer to print and determine
not pulling in
voltage loss. Check enthalpy sensor for full CCW or D setting.
No output from
Check operation of stat. Should have voltage output to Y terminal during
thermostat
cooling.
Loss or restriction of
Check condenser blower assembly for proper operation. Check for dirty
air flow
coil or inlet grille restriction.
Switch should make @ 240 PSIG ±10 (1655 kPa ±68.9). (Check settings
Defective fan cycling
control
on adjustable switch when supplied.)
No voltage output
Check stat for proper output to W terminal.
from thermostat
Fuseable link blown
Check for open and replace.
Bad contactor
Check for open and replace.
Remedy
27

Troubleshooting

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